<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>kobe</title>
    <style>
        button{
            background-color: #00ff80;
            width: 200px;
            height: 200px;
        }
    </style>
</head>
<body>
<div>
    <button>kobe</button>
</div>
</body>
</html>